Hello,
I am new to udev and am trying to get udev to make /dev/ttyUSB0 when a
FTDI cable is plugged in. I get the following from dmesg when the
cable is plugged in.
[ 48.544775] usb 3-9.3: new full-speed USB device number 9 using xhci_hcd
[ 48.645980] usb 3-9.3: New USB device found, idVendor=0403,
idProduct=6001, bcdDevice= 6.00
[ 48.645985] usb 3-9.3: New USB device strings: Mfr=1, Product=2,
SerialNumber=3
[ 48.645989] usb 3-9.3: Product: FT232R USB UART
[ 48.645991] usb 3-9.3: Manufacturer: FTDI
[ 48.645993] usb 3-9.3: SerialNumber: AL03O8V3
Unfortunately no device node /dev/ttyUSB0 is created in /dev. On the
same machine with ubuntu 18.04, I get a ttyUSB0 device node made in
dev. I tried creating the following code in
/etc/udev/rules.d/97-ftdi.rules
SUBSYSTEM=="usb", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001",
ATTRS{serial}=="AL03O8V3", MODE="0660", GROUP="dialout",
SYMLINK+="test"
This makes a test symlink but no /dev/ttyUSB0.
I have also tried mknod /dev/ttyUSB0 c 188 0, which will create the
file, but my terminal emulation software doesn't work with it. And it
is deleted when I reboot.
Looking for some ideas on how to get this cable working. Thanks in advance.
Chris
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